Augmentation Pressure Point P2

AbstractSuccessful object manipulation, such as preventing object roll, relies on the modulation of forces and centers of pressure (point of application of digits on each grasp surface) prior to lift onset to generate a compensatory torque. Whether or not generalization of learned manipulation can occur after adding or removing effectors is not known. We examined this by recruiting participants to perform lifts in unimanual and bimanual grasps and analyzed results before and after transfer. Our results show partial generalization of learned manipulation occurred when switching from a (1) unimanual to bimanual grasp regardless of object center of mass, and (2) bimanual to unimanual grasp when the center of mass was on the thumb side. Partial generalization was driven by the modulation of effectors’ center of pressure, in the appropriate direction but of insufficient magnitude, while load forces did not contribute to torque generation after transfer. In addition, we show that the combination of effector forces and centers of pressure in the generation of compensatory torque differ between unimanual and bimanual grasping. These findings highlight that (1) high-level representations of learned manipulation enable only partial learning transfer when adding or removing effectors, and (2) such partial generalization is mainly driven by modulation of effectors’ center of pressure.

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PO-27 HIGHER CENTRAL AUGMENTATION PRESSURE/INDEX IS ASSOCIATED WITH TENSION-TYPE HEADACHE BUT NOT MIGRAINE IN MIDDLE-AGED/OLDER OBESE HUMANS

Artery Research ◽

10.1016/j.artres.2014.09.033 ◽

2014 ◽

Vol 8 (4) ◽

pp. 175

Author(s):

Grazi Kalil ◽

Ana Recober ◽

William G. Haynes ◽

M. Bridget Zimmerman ◽

Gary L. Pierce

Keyword(s):

Tension Type Headache ◽

Middle Aged ◽

Pressure Index ◽

Augmentation Pressure ◽

Type Headache

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Effect of Proximal Dome and Distal Chevron Osteotomies on Plantar Pressures and Radiographic and Functional Outcomes in Hallux Valgus Surgery: A Retrospective Analysis

Journal of the American Podiatric Medical Association ◽

10.7547/20-016 ◽

2021 ◽

Vol 111 (3) ◽

Author(s):

Kadir Ilker Yildiz ◽

Abdulhamit Misir ◽

Turan Bilge Kizkapan ◽

Mustafa Cukurlu ◽

Canan Gonen Aydin

Keyword(s):

Hallux Valgus ◽

Inclination Angle ◽

Plantar Pressure ◽

Functional Outcomes ◽

First Metatarsal ◽

Pressure Point ◽

Radiographic Outcomes ◽

Metatarsal Angle ◽

Dome Osteotomy ◽

Pressure Changes

Background No detailed comparative studies have been performed regarding plantar pressure changes between proximal dome and distal chevron osteotomies. This study aimed to compare radiographic and plantar pressure changes after distal chevron and proximal dome osteotomies and to investigate the effect of radiographic and plantar pressure changes on clinical outcomes. Methods This study included 26 and 22 patients who underwent distal chevron and proximal dome osteotomies, respectively. Visual analog scale (VAS) and American Orthopaedic Foot & Ankle Society (AOFAS) forefoot scores were used to evaluate pain and functional outcomes. Hallux valgus angle, intermetatarsal angle, talar–first metatarsal angle, and calcaneal inclination angle were measured in the evaluation of radiographic outcomes. Preoperative and postoperative plantar pressure changes were evaluated. Results There were no statistically significant differences between the two groups in age, body mass index, or AOFAS forefoot and VAS scores. In the proximal dome group, the pressure measurement showed significant lateralization of the maximal anterior pressure point in the forefoot (P < .001). In addition, the postoperative calcaneal inclination angle was significantly lower (P = .004) and the talar–first metatarsal angle was significantly higher (P < .001) in the proximal dome group. Postoperative transfer metatarsalgia was observed in one patient (3.8%) in the distal chevron group and five (22.7%) in the proximal dome group (P < .05). Conclusions Proximal dome osteotomy led to more lateralization of the maximum anterior pressure point, decreased calcaneal inclination angle and first metatarsal elevation, and related higher transfer metatarsalgia.

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EFFECTIVENESS OF C1-C2 SUSTAINED NATURAL APOPHYSEAL GLIDE COMBINED WITH DRY NEEDLING ON PRESSURE POINT THRESHOLD AND HEADACHE DISABILITY IN CERVICOGENIC HEADACHE.

Asian Journal of Pharmaceutical and Clinical Research ◽

10.22159/ajpcr.2018.v11i1.22349 ◽

2018 ◽

Vol 11 (1) ◽

pp. 171 ◽

Cited By ~ 2

Author(s):

Ramesh Chandra Patra ◽

Patitapaban Mohanty ◽

Ajay P Gautam

Keyword(s):

Therapy Group ◽

Combined Treatment ◽

Cervicogenic Headache ◽

Dry Needling ◽

Pressure Point ◽

Cervicogenic Headaches ◽

Group A ◽

The Mean ◽

Headache Disability ◽

Group B

Objective: The main objective of this study was to evaluate the effectiveness of dry needling and mulligan C1-C2 sustained natural apophyseal glides (SNAGs) in increasing pressure point threshold and reducing headache disability in patients with CGH.Methods: This study was conducted on 150 patients. They were divided into three groups for the purpose of the study. Group A was referred to as the dry needling group. They were subjected to dry needling for treating the pain. Group B was the manual therapy group. The patients in this group were subjected to C1-C2 SNAGs. Group C was the combined group. Patients belonging to this group were given C1-C2 SNAGs along with dry needling.Results: Statistical analysis paired t-test was used for comparison of the mean within every group where it showed significant improvement in all the parameter (p<0.05).Conclusion: There was a consistent reduction in tenderness and improvement in disability of the patients belonging to all groups. However, Group C, where the patients were subjected to combined treatment, showed better results. Results of this study indicate that dry needling along with mulligan C1-C2 SNAGs is more beneficial in patients suffering from cervicogenic headaches.

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Total vascular resistance, augmentation index, and augmentation pressure increase in patients with peripheral artery disease

Medicine ◽

10.1097/md.0000000000026931 ◽

2021 ◽

Vol 100 (32) ◽

pp. e26931

Author(s):

Rika Takemoto ◽

Haruhito A. Uchida ◽

Hironobu Toda ◽

Ken Okada ◽

Fumio Otsuka ◽

...

Keyword(s):

Peripheral Artery Disease ◽

Vascular Resistance ◽

Augmentation Index ◽

Pressure Increase ◽

Peripheral Artery ◽

Augmentation Pressure ◽

Artery Disease

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Residential Proximity to Greenness Mitigates the Hemodynamic Effects of Ambient Air Pollution

AJP Heart and Circulatory Physiology ◽

10.1152/ajpheart.00689.2020 ◽

2021 ◽

Author(s):

Daniel W. Riggs ◽

Ray Yeager ◽

Daniel J. Conklin ◽

Natasha DeJarnett ◽

Rachel J Keith ◽

...

Keyword(s):

Arterial Stiffness ◽

Pulse Pressure ◽

Vegetation Index ◽

Augmentation Index ◽

Systolic Pressure ◽

Ambient Air ◽

Ambient Air Pollution ◽

Linear Regression Models ◽

Residential Proximity ◽

Augmentation Pressure

Background: Residential proximity to greenness is associated with a lower risk of cardiovascular disease (CVD) and all-cause mortality. However, it is unclear whether the beneficial effects of greenness are linked to a reduction in the effects of ambient air pollutants. Methods and Results: We measured arterial stiffness in 73 participants with moderate to high CVD risk. Average levels of ambient PM2.5 and ozone were calculated from local monitoring stations. Residential greenness was estimated using satellite-derived normalized difference vegetation index (NDVI) for a 200m and 1km radius around each participant's home. Participants were 51% female; average age of 52 years; and, 79% had diagnosed hypertension. In multiple linear regression models, residential NDVI was negatively associated with augmentation index (-3.8% per 0.1 NDVI). Ambient levels of PM2.5 (per interquartile range (IQR) of 6.9 μg/m3) were positively associated with augmentation pressure (3.1 mmHg), pulse pressure (5.9 mmHg), and aortic systolic pressure (8.1 mmHg). Ozone (per IQR of 0.03 ppm) was positively associated with augmentation index (5.5%), augmentation pressure (3.1 mmHg), and aortic systolic pressure (10 mmHg). In areas of low greenness, both PM2.5 and ozone were positively associated with pulse pressure. Additionally, ozone was positively associated with augmentation pressure and systolic blood pressure. However, in areas of high greenness, there was no significant association between indices of arterial stiffness with either PM2.5 or ozone.Conclusions: Residential proximity to greenness is associated with lower values of arterial stiffness. Residential greenness may mitigate the adverse effects of PM2.5 and ozone on arterial stiffness.

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Abstract 4688: The Impact of Marfan Syndrome on Arterial Stiffness and Endothelial Function: The Role of Matrix Metalloproteinases

Circulation ◽

10.1161/circ.118.suppl_18.s_930-c ◽

2008 ◽

Vol 118 (suppl_18) ◽

Author(s):

Stella Brilli ◽

Dimitris Tousoulis ◽

Charalambos Antoniades ◽

George Hatzis ◽

Nikos Ioakeimidis ◽

...

Keyword(s):

Matrix Metalloproteinases ◽

Arterial Stiffness ◽

Endothelial Function ◽

Marfan Syndrome ◽

Augmentation Index ◽

Flow Mediated Dilation ◽

Arterial Tree ◽

Augmentation Pressure ◽

The Impact

Background: Marfan syndrome is characterised by high risk of aortic dissections and increased cardiovascular risk. However, the impact of Marfan syndrome on endothelial function and arterial stiffness is unclear, while the role of matrix metalloproteinases is unknown. We examined the impact of Marfan syndrome on the elastic properties of the arterial tree, and vascular endothelial function, and we evaluated the potential role of matrix metalloproteinases in these effects. Methods: The study population consisted of 17 subjects with Marfan syndrome, aged 26.6±2.3 years old, with BMI 20.5±1.03Kg/m2 and 22 healthy individuals matched for gender, age (26.4±0.78 years old, p=NS) and BMI (22.4±0.86 Kg/m2). Arterial stiffness was evaluated by measuring carotid-femoral pulse wave velocity (PWV), while augmentation pressure and augmentation index (AIx) were also determined, as measures of arterial wave reflections. Endothelial function was evaluated by determining flow mediated dilation (FMD) in the brachial artery while matrix metalloproteinase 9 (MMP-9) levels were determined by ELISA. Results: Patients with Marfan syndrome had significantly lower pulse pressure in the radial artery (41.0±1.07mmHg) compared to controls (51.3±4.4mmHg). In addition, patients had higher AIx (17.6±2.4%) and augmentation pressure (5.44±0.65mmHg) compared to controls (7.72±3.43% and 2.41±1.14mmHg respectively, p<0.05 for both). However, the difference in PWV between patients and controls did not reach statistical significance (6.33±0.33 vs 5.96±0.23m/s respectively, p=NS). Patients with Marfan syndrome had lower FMD (2.05±1.13%) and higher plasma MMP-9 (827±70ng/ml) compared to controls (6.8±2.3% p<0.05 and 326±50ng/ml, p<0.01). Conclusions: Marfan syndrome is associated with increased MMP-9 levels, as well as with elevated augmentation index and augmentation pressure compared to healthy individuals, matched for age, gender and body mass index. Moreover, flow-mediated dilation is also impaired in these subjects. These findings suggest that Marfan syndrome directly affects the elastic properties and endothelial function of the arterial tree, with matrix metalloproteinases being important mediators in the pathophysiology of this syndrome.

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